import sys
readline = sys.stdin.readline

N = int(input())
a = [list(map(int, input().split())) for _ in range(N)]
ans = 1

for i, (x1, y1) in enumerate(a):
    for x2, y2 in a[i+1:]:
        dx, dy = x2-x1, y2-y1
        cnt = 0
        for x3, y3 in a:
            if (x3-x1)*dy == (y3-y1)*dx:
                cnt += 1
        if ans < cnt:
            ans = cnt

print(ans)